October in Parry Sound is the rainiest month of the year. In October, the weather in Parry Sound is typically warm. Average daily high temperature in October is about 12 degrees above zero. On average, Parry Sound has 15 rainy, 7 partly cloudy, 6 sunny, and 3 cloudy days in October. The rains are usually heavy. October as well as March, April, November, and December is considered the most uncomfortable time to visit Parry Sound.